iovec(3type)

NAME#

iovec - Vector I/O data structure

LIBRARY#

Standard C library (libc)

SYNOPSIS#

#include <sys/uio.h>

struct iovec {\n
\n    void   *iov_base;\n  /* Starting address */
\n    size_t  iov_len;\n   /* Size of the memory pointed to by \n
\niov_base\n. */
\n};\n

DESCRIPTION#

Describes a region of memory, beginning at iov_base address and with the size of iov_len bytes. System calls use arrays of this structure, where each element of the array represents a memory region, and the whole array represents a vector of memory regions. The maximum number of iovec structures in that array is limited by IOV_MAX (defined in <limits.h>, or accessible via the call sysconf(_SC_IOV_MAX)).

STANDARDS#

POSIX.1-2008.

HISTORY#

POSIX.1-2001.

NOTES#

The following header also provides this type: <sys/socket.h>.

SEE ALSO#

process_madvise(2), readv(2)